Improved autosave semantics.

Autosaves no longer occur if you are standing still, sleeping, etc.
Merge branch 'master' of github.com:TheDarklingWolf/Cataclysm-DDA
Suppress autosave in vehicles.
ACTUALLY suppressed saves in vehicles.
And finally, ACTUALLY improved autosave semantics.

Sleeping and waiting should now only give one autosave,
at the very beginning of the action.
Merge pull request #9 from wito/master

Improved autosave semantics